When a man pulled two guns on convenience store clerk Wazir Jiwi and demanded money, Jiwi asked how much he wanted for one of the guns. He said $100, which Jiwi paid him. Then Jiwi offered to buy the second gun. The robber handed it over, grabbed the cash and headed for the exit. But Jiwi had pushed a button under the counter that automatically locked the door.

He turned to me and asked what was going on, Jiwi says. I told him to bring the money back and I would let him go. He brought the money back, and I opened the door.